Homothermy of water column in the cooling reservoir
Abstract
Specific features of the thermal regime of a cooling reservoir are considered using the example of the Desnogorsk reservoir. The results of hydrological surveys of the reservoir in different seasons were analyzed to describe the structure of water column and its intra-annual transformation in the area affected by the heat sink from the Smolensk nuclear power plant (SNPP). The reasons of the absence of reverse winter stratification in the most mixed part of heat-affected area are discussed. It was found that the direct stratification of water column could continue in winter in the parts of water area adjacent to the point of heat discharge. The process of formation of a long-lasting autumn-winter-spring homothermy and its transition to spring-summer direct stratification is described for thermally altered part of the reservoir. Its interaction with not-affected water mass of the reservoir is considered. It is noted that the spring transition to direct stratification is significantly accelerated due to the influence of the density (cold) flow at the bottom and the heat one at the surface.
Supporting agencies: The author thanks the staff of the laboratories of hydrochemistry and freshwater fish of Russia of the VNIRO, who participated in field work at the Desnogorsk reservoir, as well as the staff of the laboratory of reservoir biotechnology and the workshop of the SNPP support systems, who provided all necessary support during the study.
About the Author
S. A. Lapin
All-Russian Federal Research Institute of Fisheries and Oceanography
Russian Federation
Russian Federation
Leading Scientific Researcher, Ph.D. in Geography, Department of Climate Dynamics and Aquatic Ecosystems VNIRO.
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Review
For citations:
Lapin S.A. Homothermy of water column in the cooling reservoir. Vestnik Moskovskogo universiteta. Seriya 5, Geografiya. 2022;(3):143-149. (In Russ.)
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